Sash-balance



2 Shets-Sheet 1. F. P. JOHNSON.

SASH BALANCE.

Patented Mar. 31, 1891.

'ms mann u Penas co., Pnnvcnnmw., wlsumuwn, n. c.

(No Model.) 2' sheets-sneet 2.

F. P. JOHNSON.

sAsH BALANCE.

N0..449,5s8. Patented Mar. s1, 1891.

F Al C S Vil infr FI C B- NiTED STATES PATENT Y Fries.

SASH-BALANCE.

SPCI'FI'CATON forming part of Letters Patent No. 449,538, dated March 31 1891.

Application filed October 30, 1890.

To all whom it may concern:

Be it known that I, FRANK P. JOHNSON, a

citizen of the United States, residing at Eyers Grove, in the county of Oolumbia and State of Pennsylvania, have invented a new and useful Sash-Balancer, of which the following is a specification. This invention relates to balances for the sashes of windows.; and the object of the same is to effect improvements upon devices of this character heretofore existing.

To this end the invention consists of a spring-roller adapted to raise the windowsashes and constructed as hereinafter more fully described and claimed, and as illustrated in the drawings, in which- Figure 1 is an inside elevation of a windowframe provided with my improved device for raising the sashes thereof. Fig. 2 is au enlarged central longitudinal section of the roller. Fig. 3 is a perspective detail of the locking means between the two outer members of the roller. Fig. tis a similar view relating to the inner members. Fig. 5 is a similar view of the latch end of the roller, the members being longitudinally separated for a slight-distance. Fig. 6 is an end viewof one of the drums, showing the manner in which the end of the strap is locked therein.

Referring to the said drawings, the letter F designates the window-frame, in which move the window-sashes S in the ordinary manner. From each sash and at each edge thereof leads upwardly a metallic strap M, the straps on the lower sash leading in one direction around end drums E and the straps on the upper sash leading in the opposite direction around drums D just inside said end drums. In the face of each drum at a certain point is cut a notch n, having an enlarged inner end N, and the strap after passing several times around the drum leads into the notch and varound a plug or pin P at its enlarged inner end, all as best'seen in Fig. 6. In this manner the straps lare fastened to the drums, and the latter are caused to turn oppositely to each other, so as to normally wind up the straps and raise the sashes by the mechanism described below. The inner member of the roller comprises a rod 1, carrying an end drum E near one end, beyond which the rod has a stub-shaft 2, and the other end of the rod is tubular, as at 3.

Serial No. 369.839. (No model.)

There is a complement-ary section 1l of this rod near whose outer end is the other end drum E, whose outer end forms the other stub-shaft 12, and whose body is squared, as at 13, so as to slide longitudinally within the tubular portion 3, but to rotate therewith. The outer member of the roller comprises a tube 20, having rigidly secured to one end one of the inner drums D, the latter having a hole through its center adapted to turn upon the rod 1l just inside its drum E. There is a complementary tube 30, adapted to slide within the tube 20, the latter having a springcatch 2l at its inner end whose tip projects inwardly through its body and is adapted to engage one of a number of holes 3l inthe inner tube 30. The otherinner drum D is of ring shape, and its inner end projects into the outer end of the inner tube 30. Upon the latter is a spring-catch 32, whose tip 33 exvtends inwardly through the tube and through ner drum D is detachahl y locked to the outerV end of the inner tube 30 and must turn with the outer member of the roller.

is along spiral spring, which is connected at one end to the body of the rod 1, extends in spiral form around the inner member of the roller to near its other end, turns at the point 52, extends in spiral form back over its own body and over the point 51, and is connected at the point 52 to the inner end of the hub 41. ,J

The operation of this device is as follows: The roller being placed in the window-frame and its stub-shafts 2 and l2 journaled in suitable xtures X, eitherbelow the upper crossbar of the frame or within the upper en d of the frame-work, the sashes are put in place and the metallic straps M connected thereto and wound in opposite directions around the drums. If the window-frame be broader or narrower than the average, the spring-catch 21 is manipulated so that its tip shall disengage the holes 3l. The two tubes 2O and 30 are ICO moved longitudinally (the two sections of the inner member moving with them) until the stub-shafts are the proper distance apart to engage the brackets or bearings X, and the catch 2l sprung into the hole 3l, that is then beneath its tip. The disk At0 is now turned by hand so that the teeth 42 on its hub pass beneath the tip 253 of the spring-catch 32, and this motion is continued until the spring has been wound suliiciently to possess considerable stored energy. Thereafter when one or both sashes are drawn downwardly the straps M, connected thereto, rotate the drums to which their other ends are connected and cause a still greater winding of the spring 50. As the two outer drums E are connected to the inner member of the roller, which is connected to one end of the spring, and the two inner drums are connected to the outer or tubular member of the roller, which is connected to the other end of the spring, it will be obvious that the rotation of these drums in opposite directions by the descent of the sashes will cause the wigding of the spring from both ends. The spring need not therefore be connected to any fixed support. The tension of the spring can be adjusted by turning the disk 40, and the roller can be taken apart by disengaging the tip 3S of the catch 32 from the hole 3i in the ringshaped drum, while it can be adjusted in length by arranging the tip of the catch 2l to engage whichever of the holes 31 is desirable.

That is claimed as new isl. The herein-described spring-roller, the same comprising an inner member consisting of a rod with a drum fixed upon each end thereof, means for adjusting said rod in length, an outer tubular member surrounding said rod and having drums at its ends turning upon the inner member adjacent and inside the drums thereon, and a coiled spring connected at one end to the rod and at the other end to the tube, as and for t-he purpose set forth.

2. The herein-described spring-roller, the same comprising an inner member consisting of a rod with a drum fixed upon each end thereof, an outer tubular member surrounding said rod and having drums at its ends turning upon the inner member inside the drums thereon, means for adjusting each member in length, and a coiled spring connected at its opposite ends to the members of the said roller, as and for the purpose set forth.

3. In a springloller, the combination, with the inner member thereof consisting of arod in two sections, having drums iixed thereon 3o near its outer ends, and means for substantially adjusting said inner memberin length, of an outer member comprising two tubes, each having a drum at its outer end turning upon the inner member inside the drums thereon, the inner tube sliding within the outer and being provided with a series of holes, a catch upon the outer tube passing through its body and engaging one ol said holes, and a coiled spring connected at its op posite ends to the members of said roller, substantially as described.

Al. In a spring-roller, the combination, with the outer member thereof consisting of two tubes, one sliding upon the other, means for retaining them in longitudinally-adjusted positions, and drums at the outer ends of said member, of an inner member comprising a rod in two sections, one section being square and the other tubular and fitting upon the square section, and each section turning ina hole through the drum at its end of the roller, outer drums iixed upon said sections just outside said inner drum, and a coiled spring connected at its opposite ends to the members of said roller, substantially as described.

5. In a spring-roller, the combination, with the inner member thereof comprising arod in two sections, one section being square and the other tubular and fitting u pon the square section, and outer drums fixed upon said sec tions near their outer ends,of the outer member comprising two tubes, each having a drum at its outer end turning upon the inner member inside the outer drums thereon, the inner tube sliding within the outer and being provided with a series of holes, a spring-catch on the outer face of the outer tube whose tip passes through the body of said tube and engagesone of said holes, and a coiled spring connected at one end to the inner member and at its outer end to the outer member, its body extending from said points of connection along within the outer member and around the inner member in a double helix, substantially as described.

6. In a spring-roller, the combination, with a rod and an outer drum thereon, of a disk having a hub turning on the rod adjacent said drum, ratchet-teeth on said hub, an inner drum surrounding said hub, means for connecting this drum with the hub, and aspring surrounding the rod and connected at one end thereto and at the other end to the hub, as and for the purpose set forth.

7. In a spring-roller, the combination, with a rod and an outer drum thereon, of a disk having a hub turning on the rod adjacent said hub, ratchet-teeth on the outer face of said hub, an inner drum surrounding said hub and having a hole through its body, a tube one end of which embraces the inner end of said inner drum, a spring-catch on said tube, its tip removably inserted through Jthe body of the tube and through said hole and engaging said teeth, and a spiral spring connected at one end to the rod and at the other end to the hub, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

FRANK P. .IOlINSGN iVit-nesses:

JOHN L. Woons, E. P. WILLIAMS.

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